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Name/size these Brembo carrier bolts?

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    Name/size these Brembo carrier bolts?

    Was disassembling a car to do rod bearings and the Brembo kit on it (380mm, 4-piston, so I think GT, but honestly I have no idea) was WAY overtorqued to the caliper bracket. All four bolts took a breaker bar the entire time to remove... it was quite a workout.

    Obviously they're stretched and garbage. I'd prefer to get the exact same bolt, hex head included, rather than just trying to match size and threading. But I have no idea where I'd find them. Anyone have any ideas on size and a reseller?

    Click image for larger version

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    #2
    Looks like your standard Socket Head Cap Screw. Any local fastener store like Fastenal should have it. If all else fails, the tried-and-true McMaster-Carr will definitely have one that is an exact match

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      #3
      Looking at the end of the thread on your bolt, are you sure the thread in your carrier isn’t stripped???

      I have the exact same brakes as you, I will measure my spare bolts this afternoon and will reply back. I think they are M12x1.5x70mm but let me double check to make sure.
      GT4 Composites

      2003 BMW E46 M3 Laguna Seca Blue / LSB 6mt
      2006 BMW E46 M3 Estoril blue / Black 6mt
      2024 Toyota Land Cruiser Black

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        #4
        Originally posted by timmo View Post
        Looks like your standard Socket Head Cap Screw. Any local fastener store like Fastenal should have it. If all else fails, the tried-and-true McMaster-Carr will definitely have one that is an exact match
        And if you can't find anything locally, here's another option: https://www.belmetric.com/allen-socket-heads-c-6_339/

        Though I kind of wonder if they just resell McMaster-Carr LOL. Also wondering the same as Gt4 with the threads in the bracket.
        '03.5 M3 SMG Coupe - Jet Black / Black

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          #5
          Originally posted by Gt4 View Post
          Looking at the end of the thread on your bolt, are you sure the thread in your carrier isn’t stripped???
          No, and that is a HUGE concern because in addition to being stupidly overtightened, they were also installed incorrectly and backwards.

          So yes, I know what you're thinking... are the calipers themselves F-ed... and that would be my next big fear.

          With my 20 years of luck with these cars, I expect that to be the case. But at least in this case it's not the end of the world, I didn't pay for these.

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            #6
            How can they be mounted backward??? Seems impossible to me due to the offset in them, you wouldn’t be able to fit calipers on rotors.

            I was correct, the bolt are M12x1.5x70mm. I have 4 brand new bolts if you want
            Attached Files
            GT4 Composites

            2003 BMW E46 M3 Laguna Seca Blue / LSB 6mt
            2006 BMW E46 M3 Estoril blue / Black 6mt
            2024 Toyota Land Cruiser Black

            Comment

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